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Shale shaker with stair-stepped arrangement of screens and methods of using same, and methods of retrofitting shale shakers

a technology of stair-stepped arrangement and shaker, which is applied in the direction of filtration separation, separation process, and well accessories, etc., can solve the problems of viscosity and gel problems, increased wear of mud pumps and other mechanical equipment used for drilling, and loss of circulation materials of drilling mud

Active Publication Date: 2016-11-03
ELGIN SEPARATION SOLUTIONS IND LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides improved shale shakers that can reduce or eliminate solids by passing the seals between abutted shaker screens arranged in a deck. These improved shale shakers also reduce or eliminate the exposure of the screen seals to the processed fluids and / or solids, and degradation of the screen seals during operation.

Problems solved by technology

The drilling mud may also carry lost circulation materials for sealing porous sections of the borehole.
The drilling mud contains inter alia expensive synthetic oil-based lubricants and it is normal therefore to recover and re-use the used drilling mud, but this requires inter alia the solids to be removed from the drilling mud.
If drilled solids are not removed from the mud used during the drilling operation, recirculation of the drilled solids can create viscosity and gel problems in the mud, as well as increasing wear in mud pumps and other mechanical equipment used for drilling.
The frame of the vibrating screen is resiliently suspended or mounted upon a support and is caused to vibrate by a vibrating mechanism, e.g. an unbalanced weight on a rotating shaft connected to the frame.
A particular problem is encountered when two or more screens are abutted together in a linear arrangement to form a deck of screens.
In addition, between the corrosive action of the vibrating particles against the seals abrading the seals, and the harsh effect of the oil based fluids eating away on the seals, the integrity of the seal is slowly compromised.
This too results in a certain amount of particles by-passing the seals and falling through.

Method used

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  • Shale shaker with stair-stepped arrangement of screens and methods of using same, and methods of retrofitting shale shakers
  • Shale shaker with stair-stepped arrangement of screens and methods of using same, and methods of retrofitting shale shakers
  • Shale shaker with stair-stepped arrangement of screens and methods of using same, and methods of retrofitting shale shakers

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Embodiment Construction

[0049]Prior to a discussion of the present invention, and in order to better understand how the present invention is an improvement over the prior art, reference will first be made to FIGS. 1 and 2 showing two prior art multi-screen deck arrangements commonly utilized in prior art shale shakers.

[0050]Referring first to FIG. 1, there is shown a common prior art multi-screen linear deck arrangement that is commonly utilized in shale shakers, showing deck 8 comprising three screen assemblies. Each screen assembly generally includes a screen 5 and a screen frame 7 around the screen 5. There are seals 3 interposed there between the screen assemblies, all supported by support frame 2. Vibration is utilized to urge the flow of solids containing fluids across screens 5 one screen at a time as shown by arrows 1 representing the flow. It should be understood that at each screen and depending upon the rating of the screen, a certain amount of fluids / solids pass through the screen, with a certa...

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Abstract

A shale shaker that includes a base, a basket, a vibrator interconnected with the basket, and two shaker screens releasably mounted on the basket, with the first shaker screen having a discharge end, with the second screen having a first end with a seal abutted thereto, with the second screen positioned such that the seal is positioned below the first shaker screen, and positioned so that discharge from the first screen will not discharge onto the seal.

Description

RELATED APPLICATION DATA[0001]Not applicable.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to methods of and apparatus for the processing of drilling fluids. In another aspect, the present invention relates to drilling fluid processing apparatus and methods for processing drilling fluids. In even another aspect, the present invention relates to shale shakers for processing drilling fluids, and to methods of processing drilling fluids with shale shakers. In still another aspect, the present invention relates to shale shakers having a stair-stepped (or cascade) shaker screen deck arrangement, and to methods of processing drilling fluids using such shale shakers, and to methods of retrofitting shale shakers. In yet another aspect, the present invention relates to shale shakers having a stair-stepped shaker screen deck arrangement arranged in a manner that will protect the seals from the direct flow of fluids / solids, and to methods of proc...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): E21B21/06B01D33/03B01D33/41
CPCE21B21/065B01D33/0361B01D33/41E21B21/066
Inventor BABRI, EMADANDERSON, MICHAEL RAI
Owner ELGIN SEPARATION SOLUTIONS IND LLC
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